This is how I think it works:
Normal Sub: Box: | Paper cone > |moves but back and forth.
So there for it compresses the air in the lil speaker box.
""The trick is instead of a paper cone pulsating back and forth. And whereas traditional subwoofers compress the air inside of a box to create the deep bass"
"The TRW 17 creates a gigantic cone of air with the fins swiveling to modulate frequency."
Sonic Sub throws out air with the fins like this: >>>>>>> but not into a small box but into the house. So like Rud said "its like being inside of a speaker"
And yes I know there bad drawings.